Module: Fathom::NumericMethods

Included in:
DataNode, PlausibleRange
Defined in:
lib/fathom/node/node_extensions/numeric_methods.rb

Instance Method Summary collapse

Instance Method Details

#coefficient_of_variation ⇒ Object Also known as: cov 



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# File 'lib/fathom/node/node_extensions/numeric_methods.rb', line 49

def coefficient_of_variation
  return nil unless vector
  vector.sd / vector.mean
end

#initialize(opts = {}) ⇒ Object 



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# File 'lib/fathom/node/node_extensions/numeric_methods.rb', line 4

def initialize(opts={})
  super(opts)
end

#interval_values(opts = {}) ⇒ Object 



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# File 'lib/fathom/node/node_extensions/numeric_methods.rb', line 45

def interval_values(opts={})
  distribution.interval_values(opts.merge(:mean => mean, :sd => sd))
end

#inverse_cdf(opts = {}) ⇒ Object Also known as: lower_bound 



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# File 'lib/fathom/node/node_extensions/numeric_methods.rb', line 36

def inverse_cdf(opts={})
  distribution.inverse_cdf(opts.merge(:mean => mean, :sd => sd))
end

#mean ⇒ Object 



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# File 'lib/fathom/node/node_extensions/numeric_methods.rb', line 31

def mean
  return nil unless vector
  vector.mean
end

#rand ⇒ Object 



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# File 'lib/fathom/node/node_extensions/numeric_methods.rb', line 8

def rand
  return nil unless vector
  distribution.rand(sd) + mean
end

#standard_deviation ⇒ Object Also known as: std, sd 



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# File 'lib/fathom/node/node_extensions/numeric_methods.rb', line 24

def standard_deviation
  return nil unless vector
  vector.sd
end

#summary ⇒ Object 



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# File 'lib/fathom/node/node_extensions/numeric_methods.rb', line 55

def summary
  {
    :mean => mean,
    :standard_deviation => standard_deviation,
    :min => vector ? vector.min : nil,
    :max => vector ? vector.max : nil,
    :lower_bound => lower_bound,
    :upper_bound => upper_bound,
    :coefficient_of_variation => coefficient_of_variation
  }
end

#upper_bound(opts = {}) ⇒ Object 



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# File 'lib/fathom/node/node_extensions/numeric_methods.rb', line 41

def upper_bound(opts={})
  distribution.upper_bound(opts.merge(:mean => mean, :sd => sd))
end

#vector ⇒ Object 



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# File 'lib/fathom/node/node_extensions/numeric_methods.rb', line 13

def vector
  return @vector if @vector
  return nil unless values
  case values
  when Array
    @vector = GSL::Vector.ary_to_gv(values)
  when GSL::Vector
    @vector = values
  end
end